Biology for IGCSE & O level - Transport In Animals (Section 2 - No. 43)
What is the main cause of a heart attack?
A blockage in a pulmonary artery
A blockage in a coronary artery
Damage to the heart valves
High blood pressure in veins
Explanation
A heart attack is typically caused by a blockage in a coronary artery, preventing blood flow to the heart muscle.
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